<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<CIK> 0000104894
<NAME> WASHINGTON REAL ESTATE INVESTMENT TRUST
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 6-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-2000
<PERIOD-START> APR-01-2000 JAN-01-2000
<PERIOD-END> JUN-30-2000 JUN-30-2000
<EXCHANGE-RATE> 1 1
<CASH> 8,983 8,983
<SECURITIES> 0 0
<RECEIVABLES> 6,700 6,700
<ALLOWANCES> 1,555 1,555
<INVENTORY> 0 0
<CURRENT-ASSETS> 17,342 17,342
<PP&E> 676,724 676,724
<DEPRECIATION> 92,941 92,941
<TOTAL-ASSETS> 616,808 616,808
<CURRENT-LIABILITIES> 21,983 21,983
<BONDS> 336,660 336,660
0 0
0 0
<COMMON> 357 357
<OTHER-SE> 256,268 256,268
<TOTAL-LIABILITY-AND-EQUITY> 616,808 616,808
<SALES> 33,350 65,285
<TOTAL-REVENUES> 33,592 65,676
<CGS> 15,257 30,059
<TOTAL-COSTS> 15,257 30,059
<OTHER-EXPENSES> 2,061 3,842
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 6,311 12,401
<INCOME-PRETAX> 9,963 20,872
<INCOME-TAX> 0 0
<INCOME-CONTINUING> 9,963 20,872
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 9,963 20,872
<EPS-BASIC> 0.28 0.58
<EPS-DILUTED> 0.28 0.58
</TABLE>